On the pH scale, a 7 indicates _____.
a base
an acid
neutrality

Answers

Answer 1

Answer:

The correct answer is:

neutrality

on the pH scale 7 is neutral above 7 is basic and below 7 is acidic.

Explanation:

The pH is an example of how acidic/basic water is. The scale goes from 0 - 14, with 7 being neutral, pH of less than 7 designates acidity, whereas a pH of greater than 7 intimates a base. pH is really a pattern of the relative amount of free hydrogen and hydroxyl ions in the water.pH is a measure of how acidic/basic water is.

It is neutral because, at this pH, the molar concentrations of Hydroxide and Hydronium are same, therefore the substance is not a base nor an acid.

Answer 2

Answer:

Final answer:

On the pH scale, a 7 represents neutrality. It is not considered acidic nor basic, but instead, it represents a balanced solution, such as pure water.

Explanation:

On the pH scale, a 7 indicates neutrality. This means that the solution is neither acidic nor basic. The pH scale ranges from 0 to 14, with 7 being the midpoint. Solutions with a pH less than 7 are considered acidic, while those with a pH greater than 7 are considered base or alkaline. So, a pH of 7 is indicative of a perfectly balanced solution, like pure water.

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What value was there in predicting the properties for gaps in Mendeleev's table?

Answers

Predicting the properties for gaps in Mendeleev’s table helps discover new elements. Because during his presentation of his proposed periodic table, he noted some gaps in his table and predicted that there are still unknown elements between those gaps. He uses some prefixes like dvi-, tri-, and eka- in order to give provisional names to his predicted elements. In his periodic table, he also laid out his elements from the lightest to the heaviest element. The lightest elements started from zero, some examples are gases.

Answer:

The Table helps discover new elements.

Explanation:

Which properties increase when moving down a group of the periodic table?Select all that apply.

reactivity
valence electrons
atomic radii
atomic mass

Answers

Explanation:

When we move down a group then there will be increase in number of shells present in an atom. Due to this there will be increase in atomic radii of the atom.

As a result, there will be increase in atomic mass of the atom also. Whereas reactivity of metals increases on moving down the group as the valence shell moves away from the nucleus. So, it becomes easy for the metal atom to lose an electron.

On the other hand, reactivity of non-metals decreases on moving down the group.

So, we can conclude that properties increase when moving down a group of the periodic table are atomic radii and atomic mass.

Atomic Mass.

Reactivity decreases as you go down a group.

Atomic Radius also decreases as you go down a group.

Valence electrons are the same within a group.

Atomic mass, however, increases as you go down a group.

Hope this helps!

When a bond is formed, energy is _________ the environment.A. released into
B. released from
C. kept stable in

Answers

When a bond is formed, energy is released into the environment. That is because it is an exothermic reaction, it releases energy.

Answer: can confirm that A: Released into. Is the correct answer

Which of these 1 M solutions will have the highest pH?(1) NaOH (3) HCl(2) CH3OH (4) NaCl

Answers

Answer:

(1) NaOH

Explanation:

NaOH, sodium hydroxide is a base. HCl, hydrochloric acid is an acid. CH3OH, methanol is an alcohol. NaCl, sodium chloride is salt.

pH below 7.0 is acidic, pH above 7.0 is basic, and pH at 7.0 is neutral.

Since NaOH is the only base in among the given compounds, its pH will above 7.0. Therefore, NaOH will have the highest pH.

Final answer:

NaOH solution will have the highest pH.

Explanation:

The solution with the highest pH would be the one that is basic, as basic solutions have higher pH values. Among the given options, NaOH is a strong base and dissociates completely in water to produce OH- ions, which makes the solution highly basic.

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What does w represent

Answers

W is a variable that can be used to represent whole numbers or the first letter of an object in the problem. Example: If a house has 4 windows on each side and there’s 4 sides of the house, find W, or the amount of windows there are total. An example for how it could also be used as a whole number is: Find W in this problem, or the whole number. Hope this helps! :)

Answer:

It is used to represent whole numbers

Explanation:

Positrons are spontaneously emitted from the nuclei of(1) potassium-37 (3) nitrogen-16
(2) radium-226 (4) thorium-232